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Physics: Entropy and the Second Law of Thermodynamics. Entropy as a state function. General formulas for calculating entropy change. How to calculate entropy change for phase change or temperature change problems. The Second Law of Thermodynamics; reversible vs. irreversible processes. Entropy change in isothermal processes, adiabatic processes, and adiabatic free expansions This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the problem and handout discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Entropy as a state function. General formulas for entropy change (2) Continued. How to calculate entropy change for phase change or temperature change problems (3) Continued. The Second Law of Thermodynamics; reversible vs. irreversible processes (4) Continued. An entropy problem (5) Continued (6) Continued (7) Continued. Entropy change in isothermal processes (8) Continued. Entropy change in adiabatic processes. Entropy change in adiabatic free expansions (9) Continued tags: education college student students university exam test educational study campus school class